CRP and thromboangiitis obliterans: To rule out other possible causes of symptoms similar to TAO, a full serological panel, including a complete blood count, liver function, kidney function, blood glucose, erythrocyte sedimentation rate, C-reactive protein, antinuclear antibodies, rheumatoid factor, anticentromere antibodies, antiphospholipid antibodies, lipid profile, anti-Scl-70 antibodies, segmental arterial doppler pressures, urinalysis, arteriography, computed tomography, echocardiography, biopsy, complete thrombophilia screening, and radiographs of the hand, should be obtained [21].